I've got hundreds of them from every brand... started same as you with 1:18 Maisto but I pretty much only collect 1:43 nowadays (mostly Minichamps) because of size/space concerns and very rarely buy any 1:18 unless they're something I have to have (I have the AutoArt Lexus LF-A as well as the Pagani Zonda).
I have almost every NSX model every made actually haha... this is what 1 of my shelves looks like (most of the NSX models and some other ones):
